regarding adjusting base fuel pressure
Note from an eec-tuner user:
I've noticed in datalogging that adjusting fuel pressure too far from stockish 40 psi will cause the EEC to adjust the injector pulsewidth back to "normal". This "keep alive memory" adjustment is broken down into two parts, short term fuel trim and long term fuel trim, the long term is used at all times including wide open throttle.
What this means to you: if you adjust your base fuel pressure way high, say 54psi, the EEC will notice all the extra fuel during cruise via the O2 sensors and tell the injectors to cut injector pulsewidth a bunch to get the motor back to stoich. Over time the adjustment goes over into long term fuel trim, at which point it will think (incorrectly) that you need the same 25% of your pulsewidth cut back at all times, including WOT! Moral: if you run this way, you must reset the keep alive memory in the EEC often, or it will start to lean out your WOT settings as the short term trim moves into the long term trim strategy. This is fine for a track car but a PITA for a daily driver.
Getting back to 1fstlx's setup with the 24# injectors: based on the 109 mph trap speed, at estimated 3425 race weight you are making@ 350 hp.
At this power level you would need something that flows a little more than 24#ers at 40psi. To get where you need to be, you need to run those 24s at 54 psi at full boost. So what you must do at this point is subtract your total boost from 54 psi to come up with a number for base fuel pressure, which in your case (being conservative) would be 54-10=44 psi.
If you set your base pressure to 44psi, you will get a 1:1 pressure increase with boost. Right now with 54 base you are getting 64 pounds under full boost, but the EEC is probably cutting back a bunch of the fuel based on the O2 sensors reading megarich during cruise.
Final nugget: After playing with the eec-tuner and datalogging for the last year, I've determined that the best path is to try to use true numbers when possible, and not try to fool the eec, because it always ends up trying to figure things out on its own and goes places you don't want it to.
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CJ